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目前,橡胶止防水材料使用的主要胶种是三元乙丙橡胶(EPDM),其具有优异的耐候性、耐臭氧性和良好的耐化学介质腐蚀性。但EPDM价格昂贵,使橡胶止防水材料生产成本增加。线性低密度聚乙烯(LDPE)具有低熔点、高分子量饱和度、分子量分布窄、耐水性能好等优点,与EPDM相容性良好,且LDPE的价格是EPDM的1/2,能大幅度降低橡胶止防水材料的价格。
At present, the main rubber used for the rubber-only water-repellent materials is EPDM, which has excellent weatherability, ozone resistance and good resistance to chemical corrosion. However, EPDM is expensive and increases the cost of producing rubber-only waterproofing materials. Linear low density polyethylene (LDPE) has the advantages of low melting point, high molecular weight saturation, narrow molecular weight distribution, good water resistance, good compatibility with EPDM, and the price of LDPE is ½ of EPDM, which can greatly reduce the rubber Only waterproof material prices.